Sofia Gatica led a grassroots movement of mothers to protest the spraying of monsanto pesticide products on genetically modified soy crops in her region of Ituzaingo, Argentina. Their efforts led to a study that determined the cancer rate in their area was 40x the national average. After 10 years, they succeeded and laws changed. Now they cannot spray within 2500 meters of homes. She is the winner of the Goldman Environmental Prize.